Sensitivity analysis for higher order Legendre coefficients of elastic scattering matrices

A sensitivity analysis is carried out focusing on higher order Legendre coefficients of elastic scattering matrices. Non-negligible library effects, which are defined as differences in criticalities caused by differences in nuclear data of different libraries, are observed in higher order Legendre coefficients of elastic scattering matrices of uranium-238 and iron-56 between JENDL-4.0 and the other modern nuclear data files. It is also found that an attention should be paid to the type of multi-group cross sections used for library effect calculations. It is concluded that higher order Legendre coefficients should be accounted for if accurate library effect evaluation is required. (author)